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首页> 外文会议>Proceedings of the American Society for Composites Twenty-Ninth technical conference, Proceedings of the 16th US-JAPAN conference on composite materials ASTM-D30 meeting >Numerical Simulation of Out-Of-Plane Impact and Compression After Impact Test on CFRP Laminates
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Numerical Simulation of Out-Of-Plane Impact and Compression After Impact Test on CFRP Laminates

机译：CFRP层压板冲击试验后的平面外冲击和压缩数值模拟

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摘要

In this study, we propose a numerical simulation method to predict which ofrnthree possible damage mechanisms – fiber breakage, matrix crack, or delaminationrn– underlies the damage behavior of carbon fiber reinforced plastics (CFRPs)rnlaminates subjected to out-of-plane impact. To model these damage mechanisms inrnCFRP laminates, a smeared crack model (for fiber breakage), a continuum damagernmechanics (CDM) approach (for matrix cracks), or interface elements (forrndelamination and large transverse cracks) was implemented in a commercial finiternelement method (FEM) code. The element size was determined on basis of therncohesive zone length to assess the stress distribution around the crack tip accurately,rnand all parameters in the proposed damage models were experimentally determined.rnTo verify the accuracy of the proposed numerical method, out-of-plane impactrnsimulations were performed on two kinds of stacking sequence. A comparison ofrnthe simulated and experimental results revealed that the predicted damage behaviorsrnand out-of-plane displacement distributions agreed well with the observed results.rnThese findings verify that the proposed numerical method is highly useful forrnimpact simulations.
机译：在这项研究中，我们提出了一种数值模拟方法来预测三种可能的损坏机制（纤维断裂，基体裂纹或分层）是碳纤维增强塑料（CFRP）层压板受到平面外冲击的破坏行为的基础。为了对CFRP层压板中的这些损伤机理进行建模，在商业有限元方法（FEM）中实施了涂污裂纹模型（用于纤维断裂），连续损伤力学（CDM）方法（用于基体裂纹）或界面元素（分层和大横向裂纹）。 ）代码。根据内聚区长度确定元件尺寸，以准确评估裂纹尖端周围的应力分布，并通过实验确定所提出的损伤模型中的所有参数。为验证所提出的数值方法的准确性，进行面外冲击仿真在两种堆叠顺序上执行。仿真结果与实验结果的比较表明，预测的损伤行为和面外位移分布与实测结果吻合良好。这些发现证明了所提出的数值方法对冲击仿真非常有用。

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